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데이터 불러오기

S-Dot 1시간 측정 평균값이 저장된 csv파일 read

#분석하고자 하는 csv데이터를 sdot이라는 데이터 프레임에 넣기 
sdot<-read.csv("data/sdot_20200507.csv", fileEncoding = 'euc-kr', head=TRUE, check.names=FALSE) 
library(rmarkdown)
paged_table(sdot)

sdot에 저장된 값에 대한 데이터 요약

#명령어 summary(데이터프레임)
summary(sdot) 
##                          시리얼              date            hour      
##  Min.   :    1   V02Q1940043:   24   2020-05-01:20280   Min.   : 0.00  
##  1st Qu.: 5071   V02Q1940044:   24                      1st Qu.: 5.75  
##  Median :10140   V02Q1940045:   24                      Median :11.50  
##  Mean   :10140   V02Q1940046:   24                      Mean   :11.50  
##  3rd Qu.:15210   V02Q1940047:   24                      3rd Qu.:17.25  
##  Max.   :20280   V02Q1940049:   24                      Max.   :23.00  
##                  (Other)    :20136                                     
##  초미세먼지 (㎍/㎥) 미세먼지 (㎍/㎥)   기온 (℃)      상대습도 (%)  
##  Min.   :  0.00     Min.   :  0.00   Min.   :15.24   Min.   :31.57  
##  1st Qu.: 14.10     1st Qu.: 18.82   1st Qu.:19.46   1st Qu.:57.06  
##  Median : 23.69     Median : 31.90   Median :21.21   Median :68.27  
##  Mean   : 23.56     Mean   : 31.75   Mean   :22.02   Mean   :64.78  
##  3rd Qu.: 31.00     3rd Qu.: 41.67   3rd Qu.:24.41   3rd Qu.:72.12  
##  Max.   :175.17     Max.   :268.33   Max.   :34.23   Max.   :85.62  
##                                                                     
##    풍향 (°)         풍속 (m/s)      돌풍 풍향 (°)    돌풍 풍속 (m/s)  
##  Min.   :  0.000   Min.   :0.00000   Min.   :  0.000   Min.   :0.00000  
##  1st Qu.:  0.000   1st Qu.:0.00000   1st Qu.:  0.000   1st Qu.:0.00000  
##  Median :  0.000   Median :0.00000   Median :  0.000   Median :0.00000  
##  Mean   :  2.363   Mean   :0.01573   Mean   :  2.328   Mean   :0.03093  
##  3rd Qu.:  0.000   3rd Qu.:0.00000   3rd Qu.:  0.000   3rd Qu.:0.00000  
##  Max.   :299.593   Max.   :4.55714   Max.   :295.750   Max.   :8.40714  
##                                                                         
##    조도 (lux)        자외선 (UVI)       소음 (dB)      진동(x) (g)     
##  Min.   :    1.00   Min.   :  1.000   Min.   : 0.00   Min.   :0.00000  
##  1st Qu.:    5.12   1st Qu.:  2.000   1st Qu.:45.38   1st Qu.:0.01833  
##  Median : 1296.71   Median :  2.130   Median :48.07   Median :0.02276  
##  Mean   : 6664.73   Mean   :  9.105   Mean   :48.17   Mean   :0.02797  
##  3rd Qu.: 9079.19   3rd Qu.: 10.823   3rd Qu.:50.90   3rd Qu.:0.03500  
##  Max.   :50200.48   Max.   :108.767   Max.   :64.52   Max.   :0.11077  
##                                                                        
##   진동(y) (g)       진동(z) (g)    진동(x) 최대 (g)  진동(y) 최대 (g)
##  Min.   :0.00000   Min.   :0.000   Min.   :0.00000   Min.   :0.0000  
##  1st Qu.:0.02815   1st Qu.:1.006   1st Qu.:0.07241   1st Qu.:0.1163  
##  Median :0.04826   Median :1.029   Median :0.08708   Median :0.1300  
##  Mean   :0.05542   Mean   :1.026   Mean   :0.09167   Mean   :0.1340  
##  3rd Qu.:0.07880   3rd Qu.:1.050   3rd Qu.:0.10088   3rd Qu.:0.1454  
##  Max.   :0.17696   Max.   :1.116   Max.   :2.41815   Max.   :2.0540  
##                                                                      
##  진동(z) 최대 (g) 흑구 온도 (℃)    미세먼지 보정 (㎍/㎥)
##  Min.   : 0.000   Min.   :  4.833   Min.   :-88.12       
##  1st Qu.: 1.095   1st Qu.:  5.000   1st Qu.: 36.09       
##  Median : 1.107   Median :  5.000   Median : 46.00       
##  Mean   : 1.117   Mean   :  7.590   Mean   : 43.68       
##  3rd Qu.: 1.124   3rd Qu.:  5.000   3rd Qu.: 53.31       
##  Max.   :10.451   Max.   :195.385   Max.   :345.60       
##                                                          
##  초미세먼지 보정 (㎍/㎥)
##  Min.   :-98.12         
##  1st Qu.: 23.23         
##  Median : 27.76         
##  Mean   : 26.87         
##  3rd Qu.: 32.00         
##  Max.   :179.97         
## 

위의 값을 확인 했을때 미세먼지보정,초미세먼지 보정 등 최소 측정 값인 0을 벗어나는 음수(마이너스)값 확인 후 제거

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